Woke up this morning with pain and numbness in my lft arm. feels like its in elbow and moves down to fingers. took pain reliever hasn't help much.

Nerve issue: Have you had this pain before? Do you use your left arm in repetitive motions on a frequent basis? It's possible you just slept on it wrong and caused a nerve to be impinged. It could also be a case of tennis elbow where overuse can lead to the upper forearm tendons to swell and impinge a nerve in your arm, causing similar symptoms.Try 2 Naproxen and ice and see if that helps. If not, see your doc